Insulating component and battery

Abstract

The present application relates to the technical field of batteries, and in particular to an insulating member and a battery. The insulating member is used for a battery, and the battery includes a housing and a pole group. The insulating member includes an attachment plate body and a partition portion. The attachment plate body is attached to one side of the housing facing the pole group for insulating both the housing and the pole group. The housing is provided with a liquid injection hole penetrating the housing in a first direction. The partition portion protrudes away from the housing in the first direction, and the partition portion covers one side of the liquid injection hole facing the pole group. According to the insulating member and the battery provided by the present application, even if the internal structure of the battery housing approaches the liquid injection hole under the action of negative pressure airflow, the insulating member can rely on the blocking effect of the partition portion to ensure the smoothness of the liquid injection hole, and effectively block the internal structure of the battery housing, reducing the probability of the internal structure of the battery housing contacting the housing through the liquid injection hole.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an insulating component and a battery. Background Art

[0002] During the battery filling process, negative pressure typically occurs inside the battery casing at the filling hole. However, the internal structures of the battery casing (e.g., tabs, electrical connectors, etc.) can easily block the filling hole due to the negative pressure airflow. This not only affects the discharge of excess electrolyte from the filling hole, but also easily causes the internal structure of the casing to overlap with the exposed portion of the cover near the filling hole, leading to cover leakage and even battery short circuit. This significantly affects the safety of the negative pressure suction process for excess electrolyte removal. Summary of the Invention

[0003] The purpose of this application is to provide an insulating component and a battery that, to a certain extent, addresses the prior art problem of negative pressure typically occurring within the battery casing at the injection hole during the battery filling process. This problem is compounded by the fact that the internal structures of the battery casing (e.g., tabs, electrical connectors, etc.) can easily block the injection hole under the influence of negative pressure airflow. This not only affects the discharge of excess electrolyte from the injection hole but also easily causes the internal structures of the casing to overlap with the exposed portion of the cover plate near the injection hole, leading to leakage of the cover plate and even battery short circuit. This significantly affects the safety of the negative pressure extraction of excess electrolyte from the battery.

[0004] According to a first aspect of the present application, an insulating member is provided for a battery, the battery comprising a housing and a pole group, the insulating member comprising an attachment plate body and a barrier portion, the attachment plate body being attached to a side of the housing facing the pole group to insulate both the housing and the pole group;

[0005] The shell is provided with a liquid injection hole that passes through the shell along a first direction, the barrier portion is fixedly connected to the attached plate body, and the barrier portion protrudes along the first direction toward a side away from the shell, and the barrier portion is covered on a side of the liquid injection hole facing the electrode group.

[0006] Preferably, the insulating member includes a liquid-passing gap, the liquid-passing gap penetrates the insulating member along the first direction, and at least a portion of the liquid-passing gap is arranged opposite to the liquid injection hole along the first direction.

[0007] Preferably, the insulating member extends along a second direction, the liquid gap extends along a third direction, the second direction and the third direction intersect, and the first direction is perpendicular to a plane defined by the second direction and the third direction.

[0008] Preferably, the size of the liquid-passing gap in the second direction is 1.5 to 3 times the diameter of the liquid injection hole.

[0009] Preferably, in the third direction, the size of the liquid passing gap is smaller than the size of the insulating member.

[0010] Preferably, the liquid passing gap penetrates through the insulating member in the third direction.

[0011] Preferably, when the insulating member and the housing are in an attached state, the partition portion forms a spaced space between the insulating member and the housing, and the spaced space communicates with the liquid passing gap.

[0012] Preferably, the size of the spaced space in the first direction is 0.3 to 0.8 times the maximum value of the size of the insulating member in the first direction.

[0013] Preferably, the attachment plate body and the partition portion are integrally connected;

[0014] The housing includes a housing body and a cover plate body, and the liquid injection hole is provided on the housing body and / or the cover plate body.

[0015] According to a second aspect of the present application, a battery is provided, including the above-mentioned cover plate body, the above-mentioned electrode group, and the insulating member according to any one of the above technical solutions. Therefore, it has all the beneficial technical effects of this insulating member, and will not be elaborated here.

[0016] Compared with the prior art, the beneficial effects of the present application are as follows:

[0017] For the insulating member provided by the present application, by providing a partition portion on one side of the insulating member facing the electrode group and covering the liquid injection hole, the partition portion protrudes away from the cover plate body in the first direction. Thus, even if the internal structure of the battery housing approaches the liquid injection hole under the action of negative pressure air flow, the insulating member can rely on the blocking effect of the partition portion to ensure the smoothness of the liquid injection hole, and effectively block the internal structure of the battery housing, reducing the probability of the internal structure of the battery housing contacting the cover plate body through the liquid injection hole.

[0018] In order to make the above objects, features, and advantages of the present application more obvious and understandable, the following specific preferred embodiments are given, and in conjunction with the accompanying drawings, the detailed description is as follows. Description of the Drawings

[0019] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 Schematic cross-sectional structure diagram of the insulating part provided by the embodiment of the present application;

[0021] Figure 2 is Figure 1 Enlarged structure diagram of the insulating part provided at C;

[0022] Figure 3 Explosion structure diagram of the insulating part provided by the embodiment of the present application;

[0023] Figure 4 Axonometric structure diagram of the insulating part provided by the embodiment of the present application;

[0024] Figure 5 Another axonometric structure diagram of the insulating part provided by the embodiment of the present application.

[0025] Reference numerals:

[0026] 11 - Attachment plate body; 12 - Partition part; 121 - Spacing space; 13 - Liquid passing gap; 14 - Grid part; 15 - Limit protrusion; 2 - Cover plate body; 21 - Liquid injection hole; 22 - Explosion-proof valve; 23 - Pole column.

[0027] F1 - First direction; F2 - Second direction; F3 - Third direction. Detailed implementation manners

[0028] The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present application.

[0029] Generally, the components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application.

[0030] All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0031] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0032] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0033] The following refers to Figures 1 to 5 Describe an insulating member and a battery according to some embodiments of the present application.

[0034] See Figures 1 to 5 As shown, an embodiment of the first aspect of the present application provides an insulating member for a battery. The battery includes a housing and a pole group. The insulating member includes an attaching plate body 11 and a partition portion 12. The attaching plate body 11 is attached to one side of the housing facing the pole group for insulating both the housing and the pole group. The housing is provided with a liquid injection hole 21 penetrating the housing along a first direction F1. The partition portion 12 protrudes away from the housing along the first direction F1, and the partition portion 12 covers the side of the liquid injection hole 21 facing the pole group.

[0035] According to the insulating member provided by the above technical features, by providing a partition portion 12 on the insulating member that covers the side of the liquid injection hole 21 facing the pole group, the partition portion 12 protrudes away from the housing along the first direction F1. In this way, even if the internal structure of the battery housing approaches the liquid injection hole 21 under the action of negative pressure air flow, the insulating member can rely on the blocking effect of the partition portion 12 to ensure the smoothness of the liquid injection hole 21 and effectively block the internal structure of the battery housing, reducing the probability of the internal structure of the battery housing contacting the housing through the liquid injection hole 21.

[0036] Preferably, the above housing may include a housing body and a cover plate body 2, and the housing body and the cover plate body 2 can enclose to form a sealed space for accommodating the above pole group.

[0037] As Figures 1 to 5As shown, the figure shows an example where the above-mentioned liquid injection hole 21 is provided in the cover body 2. In other words, the above-mentioned insulating member is attached to the side of the cover body facing the electrode group to achieve insulation between the cover body and the electrode group.

[0038] However, it is not limited to this. As not shown in the figure, the above-mentioned liquid injection hole can also be provided on one side wall of the shell body. Correspondingly, the above-mentioned insulating member can be attached to the inner side of the side wall of the shell body where the liquid injection hole is located to achieve insulation between the side wall and the electrode group.

[0039] As Figures 1 to 5 shown, the following will take the case where the liquid injection hole 21 is provided in the cover body 2 as an example to describe the insulating member in detail.

[0040] As Figures 1 to 5 shown, F1 shown in the figure can be an example of the above-mentioned first direction F1. Preferably, the first direction F1 can be perpendicular to the above-mentioned cover body 2. For the convenience of description, two mutually intersecting directions on the plane parallel to the cover body 2 are defined as the second direction F2 and the third direction F3. F2 shown in the figure can be an example of the above-mentioned second direction F2, and F3 shown in the figure can be an example of the above-mentioned third direction F3. As Figures 1 to 5 shown, taking the above-mentioned insulating member and the cover body 2 applicable to a square battery as an example, the above-mentioned first direction F1 can be the length direction of the square battery, the second direction F2 can be the width direction of the square battery (i.e., the cover body 2 extends along the second direction F2), and the third direction F3 can be the thickness direction of the square battery (i.e., the third direction F3 can be perpendicular to the second direction F2). However, it is not limited to this. As long as the internal structure of the battery is prevented from blocking or contacting the liquid injection hole 21 by setting the above-mentioned partition portion 12, the above-mentioned insulating member can also be adapted to other shaped batteries, such as cylindrical batteries or other special-shaped batteries.

[0041] Optionally, as not shown in the figure, the above-mentioned partition portion can be provided with liquid-permeable mesh holes to prevent the partition portion from interfering with the liquid inflow and outflow of the liquid injection hole.

[0042] Preferably, as Figures 2 to 5 shown, the above-mentioned insulating member can include a liquid passing gap 13. The liquid passing gap 13 penetrates the insulating member along the first direction F1, and at least part of the liquid passing gap 13 is disposed opposite to the liquid injection hole 21 along the first direction F1. In this way, the liquid injection smoothness of the liquid injection hole 21 is further ensured.

[0043] Preferably, as Figure 4 and Figure 5 shown, the above-mentioned liquid passing gap 13 can extend along the third direction F3 to facilitate the manufacturing and positioning of the liquid passing gap 13.

[0044] Preferably, as shown in Table 1 and Figure 2As shown, the dimension of the above-mentioned liquid passing gap 13 in the second direction F2 (i.e., the B value shown in the figure) is 1.5 to 3 times the aperture diameter of the liquid injection hole 21 (i.e., the A value shown in the figure). In other words, 1.5 ≤ B / A ≤ 3. In this way, while ensuring the smoothness of liquid injection through the liquid injection hole 21, it can not only effectively ensure the fitting stability between the insulating part and the cover plate body 2 under the flushing of the liquid passing in and out through the liquid injection hole 21, but also effectively reduce the probability of contact between the internal structure of the battery and the cover plate body 2 through the liquid passing gap 13 in the negative pressure state.

[0045] Table 1:

[0046]

[0047] As Figure 4 and Figure 5 shown, two embodiments of the liquid passing gap 13 are respectively shown in the figure:

[0048] Embodiment 1: As Figure 4 shown, the figure shows that the liquid passing gap 13 penetrates through the insulating part in the third direction F3. In other words, the above-mentioned insulating part is divided into two parts by the liquid passing gap 13. In this way, the insulating part can be manufactured separately through these two parts, and then assembled by fitting with the cover plate body 2. In this way, not only the die-making size of the insulating part is reduced, making it more convenient to manufacture the insulating part; moreover, dividing the insulating part into two parts can increase the replaceability of each independent part of the insulating part and reduce the error cost (the error cost here can be understood as the losses caused by the damage, manufacturing error, installation error, etc. of each independent part).

[0049] Embodiment 2: As Figure 5 shown, the figure shows that in the third direction F3, the dimension of the liquid passing gap 13 is smaller than that of the insulating part. In this way, the two parts of the insulating part on both sides of the liquid passing gap 13 in the second direction F2 are integrally connected, thereby effectively ensuring the accuracy of the liquid passing gap 13 and avoiding the influence of installation errors on the accuracy of the liquid passing gap 13.

[0050] In the embodiment, preferably, as Figures 1 to 2As shown, when the insulating member is in an attached state with the cover plate body 2, the partition portion 12 forms a spaced-apart space 121 between the insulating member and the cover plate body 2, and this spaced-apart space 121 communicates with the above-mentioned liquid passing gap 13. In this way, through this spaced-apart space 121, not only can the stamping boss formed by the liquid injection hole 21 on the side of the cover plate body 2 facing the insulating member be avoided, ensuring the fitting degree between the attachment plate body 11 and the cover plate body 2; but also, through the communication between this spaced-apart space 121 and the liquid passing gap 13, the probability that the internal structure of the battery completely blocks the liquid injection hole 21 can be effectively reduced. Specifically, in cooperation with the liquid passing gap 13 extending along the third direction F3, when the internal structure of the battery (such as the tab) blocks the liquid injection hole 21 under the action of negative pressure, as long as the internal structure of the battery does not completely block the liquid passing gap 13, the inside of the battery can be sequentially communicated with the liquid injection hole 21 through the unblocked part of the liquid passing gap 13 and the spaced-apart space 121. In this way, the probability that the internal structure of the battery completely blocks the liquid injection hole 21 is effectively reduced.

[0051] Preferably, as shown in Table 2 and Figure 2 As shown, the dimension of the above-mentioned spaced-apart space 121 in the first direction F1 (i.e., the S value shown in the figure) is 0.3 to 0.8 times the maximum dimension of the insulating member in the first direction F1 (i.e., the T value shown in the figure). In other words, 0.3 ≤ S / T ≤ 0.8. In this way, not only can it be ensured that the spaced-apart space 121 can completely avoid the stamping boss formed by the liquid injection hole 21 on the side of the cover plate body 2 facing the insulating member, preventing interference between this stamping boss and the insulating member, but also it can effectively ensure that the dimension of the partition portion 12 in the first direction F1 does not exceed the maximum dimension of the insulating member in the first direction F1, thereby avoiding interference between the partition portion 12 and the electrode group and damaging the electrode group.

[0052] Table 2:

[0053]

[0054] Preferably, the attachment plate body 11 and the partition portion 12 are integrally connected to ensure the connection stability between the partition portion 12 and the attachment plate body 11.

[0055] Preferably, the above-mentioned insulating member can be insulating plastic (such as PE / PP / PVC / PS, etc.), and the attachment plate body 11 and the partition portion 12 can be integrally injection molded.

[0056] An embodiment of the second aspect of the present application further provides a battery, including the above-mentioned cover plate body 2, the above-mentioned electrode group, and the insulating member described in any of the above embodiments. Therefore, it has all the beneficial technical effects of this insulating member, and will not be elaborated here.

[0057] Preferably, not shown in the figure, the above-mentioned cover plate body can be covered on the end of the shell body in the first direction, and the above-mentioned electrode group can be arranged inside the shell body.

[0058] Preferably, as Figure 1 and Figure 3 described, the above-mentioned cover plate body 2 can also be provided with an explosion-proof valve 22, and the above-mentioned insulating part can also include a grid part 14, which is arranged opposite to the explosion-proof valve 22 in the first direction F1. The grid part 14 is provided with air-permeable mesh holes penetrating the insulating part in the first direction F1, so that gas can be discharged to the explosion-proof valve 22 through the air-permeable mesh holes.

[0059] Preferably, as Figure 1 shown, the size of the grid part 14 in the first direction F1 is the maximum value of the size of the insulating part in the first direction F1 (i.e., the above-mentioned T value). In this way, when the insulating part is assembled in the battery, it can be in contact with the above-mentioned electrode group through the grid part 14 to limit the position of the above-mentioned electrode group in the shell body.

[0060] Preferably, as Figure 1 、 Figures 3 to 5 shown, the above-mentioned insulating part can also include a limiting protrusion 15, which is arranged at both ends of the insulating part in the second direction F2. The size of the limiting protrusion 15 in the first direction F1 is also equal to the maximum value of the size of the insulating part in the first direction F1 (i.e., the above-mentioned T value). In this way, when the insulating part is assembled in the battery, the limiting protrusion 15 can be in contact with both ends of the end of the electrode group facing the insulating part in the second direction F2 respectively, so as to further improve the limiting stability of the insulating part to the electrode group.

[0061] Preferably, as Figure 1 、 Figures 3 to 5 shown, the above-mentioned grid part 14 can be arranged in the middle of the insulating part in the second direction F2.

[0062] Preferably, as Figure 1 and Figure 3 shown, the above-mentioned cover plate body 2 can also be provided with a pole column 23, which can be arranged on the part of the cover plate body 2 corresponding to the part of the insulating part between the grid part 14 and the limiting protrusion 15 part.

[0063] Preferably, as Figure 1 and Figure 3 shown, the figure shows an example of two pole columns 23 arranged on the cover plate body 2. However, it is not limited thereto, and the number of pole columns 23 can be adjusted adaptively according to the specific structure of the battery.

[0064] Optionally, as Figure 1 and Figure 3As shown, the above-mentioned liquid injection hole 21 can be arranged between the terminal post 23 and the explosion-proof valve 22.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An insulating part, characterized in that, For a battery, the battery includes a housing and an electrode assembly, the insulating member includes an attachment plate body (11) and a partition portion (12), the attachment plate body (11) is attached to a side of the housing facing the electrode assembly for insulating both the housing and the electrode assembly; The housing is provided with a liquid injection hole (21) penetrating the housing along a first direction (F1), the partition portion (12) is fixedly connected to the attachment plate body (11), and the partition portion (12) protrudes away from the housing along the first direction (F1), and the partition portion (12) covers a side of the liquid injection hole (21) facing the electrode assembly; The insulating member includes a liquid passing gap (13), the liquid passing gap (13) penetrates the insulating member along the first direction (F1), and at least a part of the liquid passing gap (13) is disposed opposite to the liquid injection hole (21) along the first direction (F1); The insulating member extends along a second direction (F2), the liquid passing gap (13) extends along a third direction (F3), the second direction (F2) and the third direction (F3) intersect, and the first direction (F1) is perpendicular to a plane determined by both the second direction (F2) and the third direction (F3); When the insulating member and the housing are in an attached state, the partition portion (12) forms a spaced space (121) between the insulating member and the housing, and the spaced space (121) communicates with the liquid passing gap (13); A dimension of the spaced space (121) in the first direction (F1) is 0.3 to 0.8 times a maximum value of a dimension of the insulating member in the first direction (F1); The insulating member further includes a limiting protrusion (15), the limiting protrusion (15) is disposed at two ends of the insulating member in the second direction (F2), and a dimension of the limiting protrusion (15) in the first direction (F1) is equal to the maximum value of a dimension of the insulating member in the first direction (F1); A dimension of the liquid passing gap (13) in the second direction (F2) is 1.5 to 3 times a diameter of the liquid injection hole (21).

2. The insulating member according to claim 1, characterized in that, In the third direction (F3), a dimension of the liquid passing gap (13) is smaller than a dimension of the insulating member.

3. The insulating member according to claim 1, wherein The liquid passing gap (13) penetrates the insulating member along the third direction (F3).

4. The insulating member according to claim 1, wherein The attachment plate body (11) and the partition portion (12) are integrally connected; The housing includes a housing body and a cover plate body (2), and the liquid injection hole is provided in the housing body and / or the cover plate body (2).

5. A battery, characterized in that, Including the housing, the electrode assembly, and the insulating member according to any one of claims 1 to 4.

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